@skills · Owner
Agent skills by addyosmani
35 skills indexed from github.com/addyosmani. Reference any of them in AdaL, Claude Code, Cursor or any coding agent — nothing to install.
- agent-skills · Collection · 83,053 stars
- api-and-interface-design · Skill · 83,053 stars
Guides stable API and interface design. Use when designing APIs, module boundaries, or any public interface. Use when creating REST or GraphQL endpoints, d
- browser-testing-with-devtools · Skill · 83,053 stars
Tests in real browsers via Chrome DevTools MCP. Use when building or debugging anything that runs in a browser. Use when you need to inspect the DOM, captu
- ci-cd-and-automation · Skill · 83,053 stars
Automates CI/CD pipeline setup. Use when setting up or modifying build and deployment pipelines. Use when you need to automate quality gates, configure tes
- code-review-and-quality · Skill · 83,053 stars
Conducts multi-axis code review. Use before merging any change. Use when reviewing code written by yourself, another agent, or a human. Use when you need t
- code-simplification · Skill · 83,053 stars
Simplifies code for clarity. Use when refactoring code for clarity without changing behavior. Use when code works but is harder to read, maintain, or exten
- context-engineering · Skill · 83,053 stars
Optimizes agent context setup. Use when starting a new session, when agent output quality degrades, when switching between tasks, or when you need to confi
- debugging-and-error-recovery · Skill · 83,053 stars
Guides systematic root-cause debugging. Use when tests fail, builds break, something that worked yesterday broke, behavior doesn't match expectations, or y
- deprecation-and-migration · Skill · 83,053 stars
Manages deprecation and migration. Use when removing old systems, APIs, or features. Use when migrating users from one implementation to another. Use when
- documentation-and-adrs · Skill · 83,053 stars
Records decisions and documentation. Use when you need to document an architecture decision (ADR) or the reasoning behind a design choice, when changing pu
- doubt-driven-development · Skill · 83,053 stars
Subjects every non-trivial decision to a fresh-context adversarial review before it stands. Use when you want every assumption cross-examined before procee
- frontend-ui-engineering · Skill · 83,053 stars
Builds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages, creating components, implementing l
- git-workflow-and-versioning · Skill · 83,053 stars
Structures git workflow practices. Use when making any code change. Use when committing, branching, resolving conflicts, splitting uncommitted work in a me
- idea-refine · Skill · 83,053 stars
Refines raw ideas into sharp, actionable concepts through structured divergent and convergent thinking. Use when an idea is still vague, when you need to s
- incremental-implementation · Skill · 83,053 stars
Delivers changes incrementally in thin, verifiable slices. Use when implementing any feature or change that touches more than one file, or when picking up
- interview-me · Skill · 83,053 stars
Extracts what the user actually wants instead of what they think they should want. Achieves this through one-question-at-a-time interview until ~95% confid
- observability-and-instrumentation · Skill · 83,053 stars
Instruments code so production behavior is visible and diagnosable. Use when adding logging, metrics, tracing, or alerting. Use when shipping any feature t
- performance-optimization · Skill · 83,053 stars
Optimizes application performance across frontend, backend, queries, and databases. Use when performance requirements exist, when you suspect performance r
- planning-and-task-breakdown · Skill · 83,053 stars
Breaks work into ordered tasks. Use when you have a spec or clear requirements and need to break work into implementable tasks. Use when a task feels too l
- security-and-hardening · Skill · 83,053 stars
Hardens code against vulnerabilities. Use when auditing an input handler for vulnerabilities, when handling user input, authentication, data storage, or ex
- shipping-and-launch · Skill · 83,053 stars
Prepares production launches. Use when preparing to deploy to production, or when asking what needs to be in place before shipping. Use when you need a pre
- skills · Collection · 83,053 stars
- source-driven-development · Skill · 83,053 stars
Grounds every implementation decision in official documentation. Use when you want to verify an approach against the official docs before implementing it,
- spec-driven-development · Skill · 83,053 stars
Creates specs before coding. Use when starting a new project, feature, or significant change and no specification exists yet. Use when drafting a PRD or re
- test-driven-development · Skill · 83,053 stars
Drives development with tests using the red-green-refactor loop. Use when implementing any logic, fixing any bug, or changing any behavior. Use when you ne
- using-agent-skills · Skill · 83,053 stars
Discovers and invokes agent skills. Use when starting a session, or when you need to decide which skill or workflow applies to the piece of work at hand. T
- accessibility · Skill · 2,590 stars
Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to "improve accessibility", "a11y audit", "WCAG compliance", "screen read
- best-practices · Skill · 2,590 stars
Apply modern web development best practices for security, compatibility, and code quality. Use when asked to "apply best practices", "security audit", "mod
- core-web-vitals · Skill · 2,590 stars
Optimize Core Web Vitals (LCP, INP, CLS) for better page experience using field and lab evidence. Use when asked to "improve Core Web Vitals", "fix LCP", "
- performance · Skill · 2,590 stars
Optimize web performance for faster loading and better user experience. Use when asked to "speed up my site", "optimize performance", "reduce load time", "
- seo · Skill · 2,590 stars
Optimize for search engine visibility and ranking. Use when asked to "improve SEO", "optimize for search", "fix meta tags", "add structured data", "sitemap
- skills · Collection · 2,590 stars
- web-quality-audit · Skill · 2,590 stars
Run an evidence-led web quality audit covering performance, accessibility, SEO, best practices, and agentic browsing. Use when asked to "audit my site", "r
- web-quality-skills · Collection · 2,590 stars
- constraint-driven-development · Skill
Establishes a project's quality bar as a written contract and stops agents quietly lowering it. Interviews the user on which dimensions matter, supplies sa